Fold IFWL*::{Initialize|Finalize} into constructor/destructor

xfa/fwl/core/ifwl_pushbutton.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fwl/core/ifwl_pushbutton.h"
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/cfwl_themetext.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/ifwl_pushbutton.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
 IFWL_PushButton::IFWL_PushButton(const IFWL_App* app,
                                  const CFWL_WidgetImpProperties& properties)
     : IFWL_Widget(app, properties, nullptr),
       m_bBtnDown(FALSE),
       m_dwTTOStyles(FDE_TTOSTYLE_SingleLine),
       m_iTTOAlign(FDE_TTOALIGNMENT_Center) {
   m_rtClient.Set(0, 0, 0, 0);
   m_rtCaption.Set(0, 0, 0, 0);
+
+  SetDelegate(pdfium::MakeUnique<CFWL_PushButtonImpDelegate>(this));
 }
 
 IFWL_PushButton::~IFWL_PushButton() {}
 
-void IFWL_PushButton::Initialize() {
-  IFWL_Widget::Initialize();
-  m_pDelegate = new CFWL_PushButtonImpDelegate(this);
-}
-
-void IFWL_PushButton::Finalize() {
-  delete m_pDelegate;
-  m_pDelegate = nullptr;
-  IFWL_Widget::Finalize();
-}
-
 FWL_Type IFWL_PushButton::GetClassID() const {
   return FWL_Type::PushButton;
 }
 
 FWL_Error IFWL_PushButton::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     if (!m_pProperties->m_pThemeProvider) {
       m_pProperties->m_pThemeProvider = GetAvailableTheme();
     }
@@ skipping 489 matching lines @@
     CFWL_EvtClick wmClick;
     wmClick.m_pSrcTarget = m_pOwner;
     m_pOwner->DispatchEvent(&wmClick);
     return;
   }
   if (pMsg->m_dwKeyCode != FWL_VKEY_Tab) {
     return;
   }
   m_pOwner->DispatchKeyEvent(pMsg);
 }